Thank you for the question.
Yes, you can put baking soda on sores. Check out Dr. Charlotte Grayson's article on Managing Genital Herpes Symptoms and Outbreaks for more information.
Dr. Charlotte Grayson has great suggestions, but one. Do NOT take a warm bath. Herpes feeds off heat. It will spread in warm water. Don't know why on earth people suggest this. It's really contraindicated.
aloe vera gel is the best thing i've tried to heal the outbreaks. so cooling and soothing. also try alkalizing your body by drinking baking soda in water every day. all disease comes from an acidic body. alkalizing really helps heal the herpes. celery is very alkalizing.